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drm/i915: fall back to shmem pwrite when the buffer is not accessible 

It's too expensive to move it around just for that pwrite, especially
when we're trashing on the mappable gtt part like crazy.

Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Daniel Vetter 2012-03-25 19:47:38 +02:00
parent 586428852a
commit ffc62976d2
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i915/i915_gem.c
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@ -771,6 +771,7 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
if (obj->gtt_space &&
obj->cache_level == I915_CACHE_NONE &&
obj->map_and_fenceable &&
obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file);
/* Note that the gtt paths might fail with non-page-backed user